Two mythic figures forever identified with the American landscape are the itinerant evangelist and the salesman on the road. Right now, John Bradshaw, 58, is both. It is a Sunday afternoon, and for the second day he stands before an enthralled crowd at Manhattan's main convention center. All of us, he tells them, had traumatic childhoods and from them spring the unresolved anxieties of adulthood. He plays the theme in masterly fashion: the faithful are spellbound.
Bradshaw is the biggest draw and most revered name on America's insatiable pop-psychology circuit. For millions of people who are recovering from every imaginable --...